I recently did it (the other way around): - Contacts are straightforward, just export/import on their web platforms. - Calendar is tricker; I ended up linking

I recently did it (the other way around): - Contacts are straightforward, just export/import on their web platforms. - Calendar is tricker; I ended up linking my old one to not miss existing events and just create new events in the new calendar. Everything else, like photos, mails and 3rd-party apps have not been an issue for me because they connect to the same clouds/services as before. Btw, since you can do most migrations from a browser, you may just try it without buying a phone first.